Liquid-measuring pump.



PATENTED MAY 14, 1907.

G. YANACOPOULO'.

LIQUID MEASURING PUMP.-

APIIiIOATION FILED SEPT.B,1906'.

man srarns PATENT OFFICE. I

LIQUID-MEASURING PUMP.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed September 8, 1906- Serial No. 333,838.

To all whom, it may concern:

Be it known that I, GEORGE YANAC-O- POULO, a citizen of the UnitedStates of America, and resident of the city of New York, in the countyof New York and State of New York, have invented certain new and usefulImprovements in Liquid Measuring Pumps, of which the following is aspecification. I

Measuring pumps for liquids consisting of a cylinder in which a piston,by depressing the same a predetermined distance, causes the decanting ofa desired amount of liquid, are old in the art. The piston, providedwith ports for connecting the storing part of the cylinder with themeasuring chamber, is normally held in position, separating a quantityof liquid, larger than the largest quantity of liquid to be dispensed.The piston rod, in apparatus of this character, is slidingly connectedto the piston proper and provided with a flange or other means, actingas a valve body, to close the ports in the piston, forming the valveseat, before the piston is sufliciently depressed to discharge theliquid. This construction and the further fact that an apparatus of thischaracter, as a rule, requires a separate discharge pipe, makes theapparatus rather complicated and, therefore, expensive, while, at thesame time, the valves in the piston, separating the measuring chamherfrom the storing chamber in this class of devices, are mechanicallydefective.

The object of the present invention, therefore, is to provide asimplified measuring pump, obviating the defects heretofore mentioned,by rigidly connecting the piston rod to the piston and having valves inthe piston of most simple and efficient construction, and using thepiston rod as a duct for decanting the liquid. A series of stops areprovided for regulating the quantity of liquid which it is desired todischarge.

The accompanying drawings, forming part of the present application forLetters Patent, illustrate in Figure 1 a vertical cross sectional viewof a pump, built according to the present invention; Fig. 2 is ahorizontal cross section in the line 22 of Fig. 1; Fig. 3 is anelevation of the devices for predetermining the quantity of liquid, andFigs. 4, 5 and 6 are details of modified forms of the valves in thepiston.

1 in Fig. 1 is a cylindrical receptacle, permanently closed. at one endand at the other end provided with a removable cover 3. A

piston 4 is movable in the cylinder 1 and has i form of a lid, thepiston itself forming the valve seat, the valves 10 are on the side ofthe measuring chamber of thecylinder, and close, of course, when thepiston is depressed, while they open when the piston is raised.

Figs. 4, 5 and 6 illustrate modified forms of valves, and, inparticular, Figs. 4 and 5, a valve comprising a valve body 11 and avalve stem 12, which latter passes through a stem bearing 13, while themovement of the valve is preferably limited by means of a stop cross 14.

In Fig. 6 the valve proper is of similar construction to that shown inFigs. 4 and 5, but the valve motion is limited by means of a bracket 15,on the side of the valve body.

The cover 3 of the cylinder 1 shows a flange 16, surrounding the upperrim of the cylinder to which it may be secured, if desired, in anysuitable manner. The piston rod 6 passes through the hub portion 17 ofthe'cover and ends in a discharge pipe 1.8, under the outlet of whichthe glass or other container 19 for dispensing the liquid may be placed.A helical spring 20 surrounds the upper end of the piston rod 6, betweenthe cover 3 and the pressure knob 21 at the upper end of the'piston rod,and holds the piston in its uppermost, that is in its normal position. Aseries of pivoted stops 22 adjoin the upper end of the piston rod andlimit the degree of the depression of the piston.

In using the apparatus, the screw plug 23, closing the inlet to thecylinder, is removed and the cylinder filled with the liquid, which willpass through the ports of the piston into the measuring chamber untilthe latter is entirely filled, and the rest of the liquid remains in thestoring chamber of the cylinder. One of the stops 22, determining acertain quantity of liquid, is now placed in an upright position and bydepressing the knob 21, a certain quantity of liquid passes through thehollow piston rod and the discharge pipe into the dispensing containeruntil the down movement of the piston is limited by the strikingchamber, a piston adapted to slide in said container and separating thestoring chamber from the measuring chamber, a llOllOVV piston rodrigidly connected to said piston, a faucet communicating with saidhollow piston rod and, in turn, with said measuring chamber, one or morevalves in said piston adapted to be closed on the downward stroke of thepiston in the direction of the measuring chamber and to be opened on thestroke in the direction of the storing chamber, a cover on saidcontainer through which said piston rod extends, an inlet in said cover,a series of exchangeable stops on said cover to determine the extent oithe operating stroke of the piston, and means for causing the piston toreturn to its normal position.

Signed at New York, in the county oi" New York and State of New Yorkthis second d av of August A. D. 1906.

GEORGE YANACOPOULO. Witnesses:

ALEXANDER l\lANZAVINOA, SIGMUND HERZoe.

